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Thread: Generic Z80 Accelerator?

  1. #1

    Default Generic Z80 Accelerator?

    Did anyone ever make a generic plug into socket Z80 accelerator? I did a cursory google search and really didn't see much and was wondering if any of you know if such a beast exists?

    -Matt

  2. #2
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    Quote Originally Posted by hexsane View Post
    Did anyone ever make a generic plug into socket Z80 accelerator? I did a cursory google search and really didn't see much and was wondering if any of you know if such a beast exists?
    I've never seen a generic one, but it's possible that they exist for specific systems. I've certainly seen plans for a Z80-ish plug in replacement for the 8085 on the Compupro 85-88 boards.

  3. #3

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    Do you mean co-processor or overclocking or something else? I'm thinking that later versions of the chip pushed the clock rate up to 20Mhz (and beyond I think). I've run one at 8Mhz. Sometimes the problem is not the cpu chip but rather that other chips can't keep up, especially eproms.

    Or you could always get an old-school cpu speed program and test it on the altair simh program. Mine gave a simulation speed of 200Mhz. Programs load and run and compile in the blink of an eye.

  4. #4

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    A typical accelerator will have caching and wait stating so external chips will only slow things down when access to them is required.

    Not a huge fan of emulators. I prefer the feel of the actual hardware.

    Its a general query I have never seen a Z80 accelerator and was wondering if any had ever been made.

    -Matt

  5. #5
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    I have a Kaypro IV in the garage, with a 2.5<->4 Mhz "accelerator" in it.
    Came with it when I acquired it....

    Also happens to have an Advent ProGraphics video card, and an Advent Personality Module (addt'l FDD capabilities).

    T

  6. #6

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    Do you know if that is over clocking the board or if it has supporting circuitry for wait stating?

    -Matt

  7. #7
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    No idea...if I recall (I'd have to pull it out and open it) it's a small satellite board.
    Then someone wired up a toggle switch to the front panel, and there's a proper silver sticker with '2.5' on one side, and either '4' or '5' on the other. Me thinks it might also be an Advent product, but I'd have to open it up again to verify...

    T

  8. #8

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    If you ever feel inclined to I'd like to see a picture of it when/if you get a chance to do so.

    -Matt

  9. #9
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    For posterity, you might be interested in this as well:

    http://en.wikipedia.org/wiki/Z-80_SoftCard

    ziloo

  10. #10

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    Actually I'm mostly interested in a CPU socket plug in accelerator that (in theory) could be used in any Z80 based computer.

    -Matt

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